In August 2026, Dennis Quaid found himself facing a familiar moment in parenthood: saying goodbye as his children left for college. This time, it was his youngest children, twins Thomas and Zoe, taking their first steps into university life.
For Thomas Boone Quaid, the transition followed his June 2026 high-school graduation and the beginning of business studies at the University of Colorado Boulder.
His name had appeared in national headlines before he could even walk, when a hospital medication error put him and his twin sister in danger in 2007. Nearly two decades later, the most meaningful publicly documented development in his life is considerably more ordinary: starting college.
Here is what reliable records and family interviews reveal about his age, parents, siblings, childhood, education, and life in 2026.
Who Is Thomas Boone Quaid?
Thomas Boone Quaid is the son of American actor Dennis Quaid and his former wife, Kimberly Buffington. He was born on November 8, 2007, in Santa Monica, California, alongside his twin sister, Zoe Grace Quaid. He is also the younger paternal half-brother of actor Jack Quaid. In August 2026, Thomas began attending the University of Colorado Boulder, where he is studying business.
Thomas Boone Quaid Biography and Quick Facts
| Detail | Information |
|---|---|
| Full name | Thomas Boone Quaid |
| Family nickname | T-Boone |
| Date of birth | November 8, 2007 |
| Age | 18 as of November 6, 2026 |
| Birthplace | Santa Monica, California, USA |
| Nationality | American |
| Father | Dennis Quaid |
| Mother | Kimberly Buffington |
| Twin sister | Zoe Grace Quaid |
| Older half-brother | Jack Henry Quaid |
| High-school graduation | June 3, 2026 |
| University | University of Colorado Boulder |
| Field of study | Business |
| College start | August 2026 |
| Profession | College student; no verified professional acting career |
| Personal net worth | Not independently verified |
How Old Is Thomas Boone Quaid?
Thomas Boone Quaid is 18 years old as of November 6, 2026. Born on November 8, 2007, he will celebrate his 19th birthday on November 8, 2026.
His birth date is supported by an unusually authoritative document: the written testimony that Dennis and Kimberly Quaid submitted to the U.S. House of Representatives in May 2008.
The testimony identifies both children by name and confirms their shared birthday.
Thomas and Zoe were born approximately four weeks prematurely. Despite their early arrival, their parents described them as healthy at birth.
Thomas Boone Quaid’s Birth and Early Family Background
Thomas was born in Santa Monica, California, through a gestational carrier.
According to PEOPLE’s family reporting, Thomas arrived first, with his twin sister Zoe born two minutes later.
Their mother, Kimberly Buffington, was married to Dennis Quaid at the time. The couple had married in 2004, three years before the twins arrived.
Thomas entered a family already connected to the entertainment industry. His father had enjoyed decades of success in Hollywood, while his older half-brother Jack was growing up with two prominent actors as parents.
Yet Thomas’s childhood was not primarily documented through film premieres or acting credits. Public interest initially centered on a serious medical event shortly after his birth.
Who Are Thomas Boone Quaid’s Parents?
Dennis Quaid — Father
Dennis Quaid is an American actor whose career includes The Right Stuff, The Parent Trap, The Rookie, The Day After Tomorrow, and Reagan.
He is the father of three children: Jack, Thomas, and Zoe.
In interviews over the years, Dennis has discussed how parenthood changed his priorities. Those reflections became particularly relevant in 2026, when both younger children finished high school and began college.
His Hollywood career makes Thomas recognizable to some readers, but it should not be confused with Thomas’s own professional achievements.
Kimberly Buffington — Mother
Kimberly Buffington is Thomas and Zoe’s mother and Dennis Quaid’s former wife.
She and Dennis married in 2004 and finalized their divorce in 2018.
Kimberly was closely involved in the family’s response to the twins’ early medical emergency. Her name also appears alongside Dennis’s in the written Congressional testimony concerning the incident.
In June 2026, she and Dennis attended Thomas’s high-school graduation in Los Angeles.
The public record establishes these family milestones without requiring speculation about her private life.
Thomas Boone Quaid and His Twin Sister Zoe Grace
Thomas and Zoe Grace Quaid share a birthday and a highly documented early family history, but their educational paths began to diverge in 2026.
Zoe graduated from high school on May 23, while Thomas completed his studies on June 3.
Both subsequently enrolled in universities.
Thomas chose the University of Colorado Boulder, while Zoe began attending the University of Virginia.
In interviews published by PEOPLE in August and September 2026, Dennis Quaid confirmed that both children were studying business.
Although the twins entered similar academic fields, they attend different institutions. Their exact degree specializations and longer-term professional ambitions have not been reliably established.
Is Thomas Boone Quaid Related to Jack Quaid?
Yes. Jack Quaid is Thomas Boone Quaid’s older paternal half-brother.
Jack was born on April 24, 1992, to Dennis Quaid and actress Meg Ryan.
Thomas and Zoe are Dennis’s children with Kimberly Buffington. Therefore, Meg Ryan is Jack’s mother, not Thomas’s mother.
Jack has established his own acting career, appearing in productions such as The Hunger Games, Scream, The Boys, and Oppenheimer.
The brothers share a famous father, but their documented career paths are different. Jack is a professional actor, while Thomas began studying business at college in 2026.
No reliable evidence establishes that Thomas has worked professionally alongside Jack.
What Happened to Thomas Boone Quaid in 2007?
In November 2007, Thomas and Zoe were hospitalized at Cedars-Sinai Medical Center in Los Angeles after developing staph infections.
During their treatment, hospital personnel mistakenly administered a much higher concentration of heparin, a blood-thinning medication, than prescribed.
The medication concentration was 1,000 times the intended concentration.
According to Dennis Quaid’s later Congressional testimony, the twins were mistakenly given the medication on two occasions over approximately eight hours.
The error placed both infants in serious danger.
They survived and recovered, according to contemporary reporting and subsequent family accounts.
The incident received national attention because it raised important questions about medication labeling, hospital procedures, and preventable medical errors.
Although the event is part of Thomas’s documented childhood, it does not establish anything about his present health or determine the course of his adult life.
Dennis Quaid’s Congressional Testimony and Patient-Safety Advocacy
On May 14, 2008, Dennis Quaid appeared before the U.S. House Committee on Oversight and Government Reform.
The hearing concerned whether federal regulation of drugs and medical devices should prevent certain state-law liability claims.
Dennis and Kimberly submitted written testimony describing their children’s medication error and their concerns about prescription-drug safety.
Their account emphasized similarities in the labeling and appearance of heparin products with substantially different concentrations.
The family’s experience also motivated broader patient-safety advocacy, including work associated with the Quaid Foundation.
The distinction is important: Dennis and Kimberly were the public advocates. Thomas was an infant when the incident occurred and has not been documented as personally leading a public health campaign.
The original testimony remains an important primary source for understanding this chapter of his biography.
The Legal Aftermath of the Hospital Error
The medical error led to legal proceedings involving the twins’ parents, hospital-related claims, and drug manufacturer Baxter Healthcare.
Lawsuit Against Baxter Healthcare
Dennis and Kimberly Quaid brought claims against Baxter concerning the labeling and presentation of different heparin products.
They argued that similarities between the medication containers contributed to the risk of errors.
A June 17, 2009, Illinois appellate decision documented the dispute. The decision addressed the appropriate court location under the doctrine of forum non conveniens, rather than delivering a final determination of Baxter’s liability for the underlying incident.
Reported 2008 Hospital Settlement
On December 16, 2008, the Los Angeles Times reported that the Quaids had reached a $750,000 settlement associated with Cedars-Sinai.
The report distinguished that agreement from the separate Baxter litigation. Cedars-Sinai had not been sued in that action but was identified as a potential defendant.
The settlement is a historical legal fact. It should not be treated as Thomas’s personal net worth or evidence of his current financial assets.
Thomas Boone Quaid’s High-School Graduation in 2026
Nearly nineteen years after his birth, Thomas reached a major educational milestone.
He graduated from high school on June 3, 2026, during a ceremony in Los Angeles.
Dennis Quaid and Kimberly Buffington attended, as did Dennis’s wife, Laura Savoie.
The graduation was reported by PEOPLE as part of its coverage of the twins preparing for university.
Thomas’s school name, private academic results, and other student information are unnecessary to understand the milestone.
What matters publicly is that he completed high school and moved into the next stage of his education.
Thomas Boone Quaid at the University of Colorado Boulder
Thomas began attending the University of Colorado Boulder in August 2026, making university life the most substantial confirmed development in his recent biography.
During an August 27 interview with PEOPLE, Dennis Quaid said he had recently dropped his twins off at college.
A subsequent September 3 interview confirmed that Thomas was attending Colorado Boulder and studying business.
These interviews are especially useful because they go beyond earlier reports about where Thomas planned to enroll. They establish that he had actually started college.
Studying business could provide preparation for many professions, but it would be premature to describe Thomas as an entrepreneur, company founder, or finance professional.
There is no dependable public confirmation of his precise academic specialization, grades, internships, or intended career.
His university attendance is an established fact. His eventual professional direction remains unknown.
Is Thomas Boone Quaid an Actor?
There is no reliable evidence that Thomas Boone Quaid has established a professional acting career.
His father and older half-brother work in the entertainment industry, but that does not mean Thomas has chosen the same profession.
His decision to study business is a documented academic step, not proof that he has rejected acting or committed to any particular career.
Until credible acting credits or professional announcements emerge, describing him as a college student is more accurate.
What Is Thomas Boone Quaid Doing Now?
As of November 2026, Thomas Boone Quaid is known to be pursuing business studies at the University of Colorado Boulder.
His father’s interviews provide confirmation of this educational milestone.
There is no dependable basis for making claims about Thomas’s romantic relationships, employment, personal social-media accounts, or daily activities.
His transition from high school to university is the most useful current information available to readers researching his life.
Thomas Boone Quaid Net Worth
Thomas Boone Quaid’s personal net worth has not been independently verified.
Some celebrity biography websites assign financial estimates to relatives of wealthy public figures. Those figures may be misleading when the individual has no documented professional earnings or publicly established assets.
Dennis Quaid’s acting income belongs to his own financial history. Likewise, the family’s historical hospital settlement cannot reliably establish Thomas’s present wealth.
There is no credible basis for publishing a specific personal net-worth figure for Thomas in 2026.
Thomas Boone Quaid’s Life Timeline
| Date | Verified milestone |
|---|---|
| November 8, 2007 | Born in Santa Monica alongside twin sister Zoe |
| November 2007 | Twins survived a serious medication error |
| May 14, 2008 | Dennis Quaid testified before Congress |
| December 2008 | Hospital-related settlement reported |
| June 17, 2009 | Illinois appellate court issued its Baxter litigation decision |
| 2018 | Parents finalized their divorce |
| June 3, 2026 | Thomas graduated from high school |
| August 2026 | Began college at the University of Colorado Boulder |
| September 2026 | Dennis confirmed Thomas’s business studies |
| November 8, 2026 | Thomas’s nineteenth birthday |
Frequently Asked Questions About Thomas Boone Quaid
How old is Thomas Boone Quaid?
He is 18 years old as of November 6, 2026, and turns 19 on November 8.
Who is Thomas Boone Quaid’s father?
His father is American actor Dennis Quaid.
Who is Thomas Boone Quaid’s mother?
His mother is Kimberly Buffington, Dennis Quaid’s former wife.
Does Thomas Boone Quaid have a twin sister?
Yes. His twin sister is Zoe Grace Quaid.
Is Jack Quaid Thomas Boone Quaid’s brother?
Yes. Jack is his older paternal half-brother.
Is Meg Ryan Thomas Boone Quaid’s mother?
No. Meg Ryan is Jack Quaid’s mother. Thomas’s mother is Kimberly Buffington.
Where was Thomas Boone Quaid born?
He was born in Santa Monica, California, on November 8, 2007.
What happened to Thomas Boone Quaid as a baby?
He and Zoe survived a serious heparin medication error during hospitalization in November 2007.
Where does Thomas Boone Quaid go to college?
He attends the University of Colorado Boulder.
What is Thomas Boone Quaid studying?
According to Dennis Quaid’s 2026 interviews, he is studying business.
Is Thomas Boone Quaid an actor?
No established professional acting career has been reliably documented.
What is Thomas Boone Quaid’s net worth?
His personal net worth is not publicly verified.
Conclusion
Thomas Boone Quaid’s public biography spans two very different periods. His infancy became the subject of national reporting and Congressional testimony following a serious hospital medication error. In 2026, public attention returned to a more familiar family milestone: finishing high school and beginning college.
As the son of Dennis Quaid and Kimberly Buffington, Zoe Grace’s twin brother, and Jack Quaid’s younger half-brother, Thomas has recognizable Hollywood connections. Yet his own documented story is increasingly centered on education rather than entertainment.
His confirmed business studies at the University of Colorado Boulder mark the clearest beginning of his adult journey, while his future professional plans remain his own to determine.
